Kneading and pressing device for machines for making alimentary pastes



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Dec. 9, 1952 Patented Dec. 9, 1952 MAoHiNEs; Fon M An KI" NGlMilliIENTARI( Giuseppe Brabanti and Mario Eraibanti, Y f n V A Milan,Italy Y vapplication 'August 1, 194,7, serial 765,592

.. In Italy December 18, 1940' Y section 1, Public Law 690, August8.1946' Patent expires December 18, 1960` 1'1 Claims. (Cl. 10T-4f Thisinvention relates to automatic'mach-ines for' the production l ofaliinentaryV pastes, and more particularly 'to a ldevice for kneadingand pressing the doughA used inthe manufacture of suchpastes.

It is knownthat in theA automatic machines of this class wherein wormsarev employed, the kneadling of the mass has beenhitlierto obtained bysubjecting the mass te successive drawing operations; this system hasthe drawback that it causes the mass to heat too in'uch andfatigues it.On the other hand, pressure worms have the shortcoming that they' causeain-uneven pressure on the various points of thefdieso that the drawingYspeed is not. unifonn; this in turnk leads to the production ofvshorttub'es ofpaste of uneven length. and to waste when long*tubes,Y aremade.

The general objectofithis invention is to provide a device wherebythe`aiorementioned drawbacks may be eliminated; 'more particularly; it isthe object of; this vizr'ivention to providel a kneading and. pressingdevice Vwhereby working of the doug-h vis caused under pressure in thework mass and` the Ylatter, is uniformly distributed on the die therebymaking it possible to dispense with. any kind of kneading: ordistributing'plates or thelike. Otheri related obje/cts will becomeapparent. while the description proceeds.

The device according toA our invention igillustratedf in theaccompanying drawing, whereini Fig. 1 is a vertical crosssection oftheVwhole device. f w e i Fig. 2 is a plan viewy ofi the: feeding worms, and

Fig. 3. is4 an enlargediview' of'part of the pressure. worm showingtheeccentrics or expansions provided'on the'shaft 'of'said worin; #i f Fig.4' is -afragmentarygpartly sectional view of a feedingv 'worm different'from that illustrated in Fig. 1;

Fig.. 5 is a fragmentary, partly sectionalv view of another embodiment"of a feeding worm;

Fig: 6 isafragmentary, partly sectional view of still another feedingworm construction.

Referring no'w to the drawing; I indicates the lower-most part of a'hopper wherefrom the doughy mass is fedto the4 machine-.the end portionof: a paddle or blade mixer being suitable for'. this. purpose. 2 and 3areftwo horizontal worms rotating in oppositedirectionsandlmeshirlgfwith each otherinasmllh als 15.2.4911v thread 4mass'is thereby completed;

of worm 2 will be located between two adjacent threads 5 and 6 of worm3. vVertical worm 'I is placed within a cylindrical chamber orcaser I2.The upper part of said worin 'I is provided with a single threadvv whileits lower' part has a plurality of threads, threev vas shown at 8. -Itwill be understood that a vplurality of vertical worms may be' usedinstead of one. Shaft 9 of worm I has its end portion eccentricallyshaped as shown at I0. However', the. whole shaft may be made eccentric,and tliefeccentricity may vary for each portion of the shaft comprisedbetween any two adjacent threads as shown in Fig. 3; or any such portionof the worm shaft may be provided with expansions or projections. or thelike, of diiferent size and shapev and in different angular.relationship with each other.

Cylindrical chamber I2' wherein worm 1 is enclosed, has its lowermostpart enlarged to form a frusto-conical chamber I I. DieA lf3 forms thebot tom of said chamber I-I g l In operation, dough is continuously fedthrough hopper I' to horizontal worms 2 and 3. The threads of worms 2and 3 engage the doughy mass, and as the wormsl rotate in oppositedirections the doughis" fed forwardand' intoeha'mber I2 to beengaged'byvertical worm 'I; concur;- rently the doughy mass issubjectedv toV lwork-ing under' pressure and a kneading of the mass isbrought about.l

Vertical worn 'I thenA engages thev mass-fed theretoand pressesv itagainst die I3"; concur'- rently, the'mass is subjected to further"working under pressure because` ofthe action of the eccentric portions'-ofl shaft' iig/ory f= the-expansions or the like that may be providedlon said shaft instead of' the eccen'tries; Thekneading ofthe As'` the'lower portion' 8 of' worm "I isv provided with a plurality ofA threads',tl1e"mas`sA is' dis*- charged` from several points at a time; and there:fore a'perfec't distribution `of, the mass'on'the die is achievedresultingl in aunformdrawing speed. 1 I' r It will befv understoodv thatther'device and the various`r parts thereof have'fben` illustratedmerely by way Vi' exampleaiand that many changes" mayy be made: in 'theVdescription and drawing without departing from the spirit of: theinvention orv exceeding the scopeof the clairns.

Instead of using a worm 1, as illustrated in Fig. 1, a worm I5 asillustrated in Fig. 4 may be used. This worm l5 is provided with aplurali-ty of projections I6 located between adjacent threads, beingdistributed about the axis of worm I5, and being of a length shorterthan the depth of the threads. Also, the worm I5 is provided with aplurality of threads at its lower end portion, as is clearly shown inFig. 4.

In the embodiment of the invention which is illustrated in Fig. 5, theworm shaft I1 is eccentric over a portion thereof so as to provide thedesired working of the dough against the side of the cylinders, thisworm shaft I'I also having a plurality of threads at its lower end.

The embodiment of the invention which is illustrated in Fig. 6 differsfrom those illustrated in Figs. 1, 4 and 5 in that the worm shaft I8 isprovided with eccentric portions I8a, I8b and I8c which are respectivelylocated between a pair of adjacent threads, these eccentric portionscooperating with the cylinder wall to produce the desired working of thedough. The worm shaft I8 also includes a plurality of threads at itslower end.

What we claim is: Y

l. In a machine for preparing alimentary pastes, in combination, atleast one first cylinder having an outlet at one of its ends; an inletto said first cylinder, said inlet being spaced from said outlet; a,pair of feeding screws disposed lengthwise and adjacently to each otherin said first cylinder, the said screws rotating in opposite directionsand having outer thread diameters increasing toward the said outlet ofthe said first cylinder, and each of the said screws having only athread of constant pitch and a shaft of constant thickness, at least onesecond cylinder extending in a direction which is substantiallyperpendicular to the direction in which said first cylinder extends, thesaid second cylinder having an outlet at one of its ends; an opening inthe lateral wall of said second cylinder intermediately of its ends, thesaid opening being in communication with the outlet of said first fcylinder; a single pressure screw provided in said second cylinder,mounted only for rotation and feeding toward the outlet of said secondcylinder; and a pressure chamber in communication with the outlet ofsaid second cylinder.

2. In a machine for preparing alimentary pastes, in combination, atleast one first generally horizontally extending cylinder having anoutlet at one of its ends; an inlet to said first cylinder, said inletbeing spaced from said outlet; a pair of feeding screws disposedlengthwise and adjacently to each other in said first cylinder, the saidscrews rotating in opposite directions and having outer thread diametersincreasing toward theA said outlet of said first cylinder, and each ofsaid screws having only a thread of constant pitch and-a shaft ofconstant thickness; at least one second cylinder extending in a verticaldirection, the said second cylinder having an outlet at one of its ends;an opening in the lateral wall of said second cylinder intermediately ofits ends, the said opening being in communication with the outlet ofsaid first cylinder; a single pressure screw provided in said secondcylinder, mounted only for rotation and feeding toward the outlet ofsaid second cylinder; a pressure chamber disposed at the outlet end ofsaid second cylinder; and a generally horizontally extending die platedisposed in said pressure chamber.

3. In a machine for preparing alimentary l 4 pastes, in combination, atleast one first cylinder having an outlet at one of its ends; an inletto said first cylinder, said inlet being spaced from said outlet; a pairof feeding screws disposed lengthwise and adjacently to each other insaid first cylinder, the said screws rotating in opposite directions andhaving outer thread diameters increasing toward the said outlet of thesaid first cylinder; at least one second cylinder extending in adirection which is substantially perpendicular to the direction in whichsaid first cylinder extends, the said second cylinder having an outletat one of its ends; an opening in the lateral wall of said secondcylinder intermediately of its ends, the said opening being incommunication with the outlet of said first cylinder; a single pressurescrew provided in said second cylinder and feeding toward the outlet ofsaid second cylinder,

Vthe said pressure screw having a shaft and having a thread terminatingshort of the feeding end of said shaft; a plurality of additionalthreads provided on said shaft at the feed end of said pressure screw;and a pressure chamber in communication with the outlet of said secondcylinder.

4. In a machine for preparing alimentary pastes, in combination, atleast one first cylinder having an outlet at one of its ends; an inletto said first cylinder, said inlet being spaced from said outlet; a pairof feeding screws disposed lengthwise and adjacently to each other insaid first cylinder, the said screws rotating in opposite directions andhaving outer thread diameters increasing toward the said outlet of thesaid first cylinder; at least one second cylinder extending in adirection which is substantially perpendicular to the direction in whichsaid iirst cylinder extends, the said second cylinder having an outletat one of its ends; an opening in the lateral wall of said secondcylinder intermediately of its Vends, the said opening being incommunication with the outlet of said first cylinder; a single pres surescrew provided in said second cylinder and feeding toward the outlet ofsaid second cylinder,

:the said pressure screw having a number of threads at its feed end inexcess of the number of threads provided at the remaining portion ofsaid screw; and a pressure chamber disposed at the outlet of said secondcylinder.

5. In a machine for preparing alimentary pastes, in combination, atleast one first cylinder having an outlet at one of its ends; an inletto said first cylinder, said inlet being spaced from said outlet; a pairof feeding screws disposed lengthwise and adjacently to each other insaid rst cylinder, the said screws rotating in opposite directions andhaving outer thread diameters increasing toward the said outlet of thesaid first cylinder; at least one second cylinder extending in adirection which is substantially perpendicular to the direction in whichsaid first cylinder extends, the said second cylinder having an outletat one of its ends; an opening in the lateral wall of said secondcylinder intermediately of its ends, the said opening being incommunication with the outlet of said first cylinder; a single pressurescrew provided in said second cylinder and feeding toward the outlet ofsaid second cylinder, the said pressure screw having a shank and atleast one thread, at least one portion of said shank being disposedeccentrically with respect to the axis of the pressure screw; and apressure chamber disposed at the outlet ofv said second cylinder.

6, In a machine for preparing alimentary pastes, inl combination, at'.Yleast. one. rst cylinder having. an outlet at one of: itsv ends; aninletto said rst cylinder, said inlet .being spacedfrom said outlet; apair nof feeding screws disposed lengthwise and adjacently to eachotherinisaid first cylinder, the said screws rotating in oppositedirections and' having outerthread diametersincreasing toward the saidoutlet of the said-first cylinder; at least onelsecond cylinderextending in a direction which is substantially perpendicular to thedirection in which said first cylinder extends1the1said secondA cylinderhaving an loutletat one'ofY its ends; an opening in the lateral wall ofsaid second cylinder intermediately'of'. its ends, the said openingbeing in communication with the outlet of said first cylinder; a singlepressure screw provided in said second cylinder and Y feeding toward theoutlet of said second cylinder,

the said pressure screw having a shank and at least one thread; aplurality of portions of said shank being disposed eccentrically withrespect to the axis of said pressure screw and extending in relativelydifferent radial directions; and a pressure chamber disposed at theoutlet of said second cylinder.

'7. In a machine for preparing alimentary pastes, in combination, atleast one first cylinder having an outlet at one of its ends; an inletto said rst cylinder, said inlet being spaced from said outlet; a pairof feeding screws disposed lengthwise and adjacently to each other insaid first cylinder, the said screws rotating in opposite directions andhaving outer thread diameters increasing toward the said outlet of thesaid first cylinder; at least one second cylinder extending in adirection which is substantially perpendicular to the direction in whichsaid first cylinder extends, the said second cylinder having an outletat one of its ends; an opening in the lateral wall of said secondcylinder intermediately of its ends, the said opening being incommunication with the outlet of said first cylinder; a single pressurescrew provided in said second cylinder and feeding toward the outlet ofsaid second cylinder, the said pressure screw having a shank and atleast one thread; a plurality of portions of said shank being disposedeccentrically with respect to the axis of said pressure screw and havingdifferent degrees of eccentricity; and a pressure chamber disposed atthe outlet of said second cylinder.

8. In a machine for preparing alimentary pastes, in combination, atleast one first cylinder having an outlet at one of its ends; an inletto said first cylinder, said inlet being spaced from said outlet; a pairof feeding screws disposed lengthwise and adjacently to each other insaid rst cylinder, the said screws rotating in opposite directions andhaving outer thread diameters increasing toward the said outlet of thesaid first cylinder; at least one second cylinder extending in adirection which is substantially perpendicular to the direction in whichsaid first cylinder extends, the said second cylinder having an outletat one of its ends; an opening in the lateral wall of said secondcylinder intermediately of its ends, the said opening being incommunication with the outlet of said first cylinder; a single pressurescrew provided in said second cylinder and feeding toward the outlet ofsaid second cylinder, the said pressure screw having a shank and atleast one thread; a plurality of portions of said shank being disposedeccentrically with respect to the axis of said pressure screw andextending in relatively different radial directions and having differentdegrees ofI eccentricity and apressurefchamber disposedatthe outlet of,said second cylinder.` 1 g y9.1111; an machine forvpreparing' alimentarypastesin combinatiomat least one first cylinder having anv outlet at oneof its ends; an inlet to saidrrst cylinder, said inlet being spaced from,said` outlet; a pair of feeding-screws disposed lengthwise andadjacently to each other in said first cylinder, the said' screwsrotating in opposite directions and having outer thread diametersincreasing toward the said outlet of the said first cylinder; atleastone second cylinder extending in a direction which is substantiallyperpendicular to the direction in which said first` cylinder extends,the said second cylinder having an outlet at one of its ends; an openingin the lateral wall of said second cylinder intermediately of its ends,the said opening being in communication with the outlet of said firstcylinder; a single pressure screw provided in said second cylinder andfeeding toward the outlet of said second cylinder, the said pressurescrew having a shaft and having a thread; projections provided on saidshaft intermediately of adjacent thread convolutions and of a lengthshorter than the depth of said thread; and a pressure chamber disposedat the outlet of said second cylinder.

10. In a machine for preparing alimentary pastes, in combination, atleast one first cylinder having an outlet at one of its ends; an inletto said rst cylinder, said inlet being spaced from said outlet; a pairof feeding screws disposed lengthwise and adjacently to each other insaid first cylinder, the said screws rotating in opposite directions andhaving outer thread diameters increasing toward the said outlet of thesaid first cylinder; at least one secondcylinder extending in adirection which is substantially perpendicular to the direction in whichsaid first cylinder extends, the said second cylinder having an outletat one of its ends; an opening in the lateral wall of said secondcylinder intermediately of its ends, the said opening being incommunication with the outlet of said first cylinder; a single pressurescrew provided in said second cylinder and feeding toward the outlet ofsaid second cylinder, the said pressure screw having a shaft and havinga thread; projections provided on said shaft intermediately of adjacentthread convolutions and of a length shorter than the depths of saidthread, said projections being distributed about the axis of said shaft;and a pressure chamber disposed at the outlet of said second cylinder.

11. In a machine for preparing alimentary pastes, in combination, aplurality of generally horizontally extending first cylinders, each ofsaid cylinders having an outlet at one of its ends; inlets, one for eachof said first cylinders; a pair of feeding screws disposed lengthwiseand adjacently to each other in each of said first cylinders, the saidscrews rotating in opposite directions and having outer thread diametersincreasing toward said outlet of said rst cylinder; a plurality ofsecond cylinders extending in generally vertical direction, one for eachof said rst cylinders, each of said second cylinders having an outlet atone of its ends; an opening provided in the lateral wall of each of saidsecond cylinders intermediately of its ends, the said opening being incommunication with the outlet of the corresponding first cylinder; asingle pressure screw provided in each of said second cylinders, thesaid pressure screw feeding toward the outlet of said second cylinderand having a number of threads at its feed end in excess of the numberof threads provided at the remaining portion of the pressure screw; andagenerally frusto--conical wall portion extending from the outlet of eachof said second cylinders and coaxially therewith; and a common pressurechamber disposed at the outer end of said conical wall portions.

GIUSEPPE BRAIBANTI.

MARIO BRAIBANTI.

vREFERENCES CITED The following references are of record in the file ofthis patent:

Number UNITED STATES PATENTS Name Date Wiegand Oct. 6, 1874 Gelnck July17, 1894 Hall Nov. 21, 1899 Sizer Aug. 29, 1933 Braibanti et al Jan. 7,1936 Hartner May 31, 1938 FOREIGN PATENTS Country Date Sweden Sept. 6,1902 Germany 1--- June 29, 1922 France Jan. 4, 1921

